哦哦，大家来b4微软了

from nt4 src:
/*
 * Displays a byte in hexadecimal
 */
VOID
PrintHexChar( UCHAR c )
{
    PRINTF( "%c%c", "0123456789abcdef"[ (c>>4)&7 ], "0123456789abcdef"[ c&7 ] );
}

/*
 * Displays a buffer of data in hexadecimal
 */
VOID
PrintHexBuf( PUCHAR buf, ULONG cbuf )
{
    while( cbuf-- ) {
        PrintHexChar( *buf++ );
        PRINTF( " " );
    }
}
// by wannabe